Manufacture of polyester imide dispersions

US3966655A · kind A · utility

Assignee

• BASF SE

Inventors

• Jenoe Kovacs · Heßheim, DE
• Hans Jung · Ludwigshafen, DE
• Matthias Marx · Fürstenfeldbruck, DE
• Herbert Spoor · Schifferstadt, DE
• Wilfried Roschke

Key dates

• Filing date: Oct 10, 1974
• Grant date: Jun 29, 1976
• Expiry date: Oct 10, 1994

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Aqueous polyester imide dispersions are prepared by allowing molten polyester imide to solidify and then comminuting it in the dry state to a particle size of 100 .mu.m or less, whereupon the particles are milled in water to a particle size of less than 5 .mu.um. The dispersions may be used for the manufacture of heat-resistant bonds and impregnations and for electrical insulation of metallic conductors. m.